Examine source code of Smart Tab Groups

{
  "manifest_version": 3,
  "name": "Smart Tab Groups",
  "version": "1.3.2",
  "description": "Automatically groups tabs opened from an existing tab that isn't pinned.",
  "background": {
    "type": "module",
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "sessions",
    "storage",
    "tabGroups",
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{a8f179db-7b51-486b-981a-becea71dbb99}"
    }
  }
}